Deep Blue Water MP3000 Mpluse - does it work?

[PoolDoc]

Should I try to reduce TA ?

Why?

[waterbear]

With a SWCG dropping your TA to around 70 ppm will slow the pH rise caused by the cell generating and causing aeration of the water which causes CO2 to outgas which causes pH rise.

However, before you attack TA get the CYA in line and get the unit adusted to maintaiin 5-6 ppm FC. Then adjust the TA and keep your pH between 7.6 to 8.0 (actually, when it climbs above 7.8 drop it back to 7.6.)

[spibill]

I'll get more CYA tomorrow.

[spibill]

CYA up to 100. pH has been holding at 7.6 for 3 days, first time ever for that. I'll monitor a few days then reduce TA.

[waterbear]

Once you reduce the TA do not lower the pH below 7.6 and when it just climbs above 7.8 drop it back to 7.6. In conjunction with keeping the CYA at 100 and maintaining the FC at 5-6 ppm you should find that your pH becomes much more stable than it has been, particularly with the 50 ppm borate.